Construction
Flooring material
Estimate flooring area including waste and packs.
Calculators / Construction / Deck board material
Deck board material calculator
Estimate deck boards from deck width, board width, gaps, and waste.
On this page
Deck area20m²
Board rows28rows
Linear board length154m
Calculator controls
How to calculate
Estimate deck boards from deck width, board width, gaps, and waste.
rows = ceil(deck width ÷ (board width + gap)); linear length = rows × run × waste factor
Worked example
Deck board run length (m): 5; Deck width across boards (m): 4; Board face width (mm): 140; Gap between boards (mm): 5; Waste allowance (%): 10.
Deck area: 20 m²; Board rows: 28 rows; Linear board length: 154 m.
Assumptions and limits
Board direction, stock lengths, joins, picture framing, stairs, and local structural requirements need a detailed layout.
Results are rounded for display; calculations use unrounded values. Read our calculation methodology.
Understanding the result
Estimate deck boards from deck width, board width, gaps, and waste. Every assumption remains visible so the result can be checked or changed.
When this tool is useful
Use the deck board material for an initial estimate, comparison, or classroom calculation.
Understanding your inputs
| Input | What to enter |
|---|---|
| Deck board run length (m) | Enter a number of at least 0.000001 and no more than 1000000000000. |
| Deck width across boards (m) | Enter a number of at least 0.000001 and no more than 1000000000000. |
| Board face width (mm) | Enter a number of at least 0.000001 and no more than 1000000000000. |
| Gap between boards (mm) | Enter a number of at least 0 and no more than 1000000000000. |
| Waste allowance (%) | Enter a number of at least 0 and no more than 100. |
Frequently asked questions
What are the limits of this deck board material?
Board direction, stock lengths, joins, picture framing, stairs, and local structural requirements need a detailed layout.
Can I use different units?
Use the units printed beside each field. Convert measurements first when your source uses different units.